Mode of setting telegraph-poles



( N 0 ModelJi Y W. MURRAY.

MODE 0F SETTING TELEGRAPH POLES. I No. 359,622. Patented mar zz, 1887.

- UNITED STATES PATENT @FFICE.

WILLIAM MURRAY, OF MINNEAPOLIS, MINNESOTA.

MODE OF SETTING TELEGRAPH-POLES.-

SPECIFICATION forming part of Letters Patent No. 359,622, dated March 22, 1887.

' Application filed June1 5,1885. Serial No.168,806. (No model.)

T all whom it may concern:

Be it known that I, WILLIAM MURRAY, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented a Caisson for Setting Telegraph-Poles, of which the following is a specification.

Theinvention is shown in theaccoinpanying drawings, inwhich- Figure 1 is a sectional view of my caisson set asin use; Fig. 2, aview of thecaisson with the sections latched together, and Fig. 3 the same with the sections unlatched.

The object of my invention is to sct a telegraph-pole five feet in the quicksand.

To carry my invention into effect, I take two pieces of iron five feet long and twentyeight inches wide and one-quarter of an inch thick, each being half of the caisson, and these are bent in a halfcircle lengthwise o-f'the piece, and when the two parts are put together they will form a cylinder five feet long Y Figs. 2 and 3, in A and B.

having a circumference of fifty-six inches and a diameter of eighteen inches. I rivet a piece around the top of the cylinder, one inch wide and one-quarter of an inch thick, as at 9 in I then put two links in part B, as at 4 4, which hook in a notch over the top of A, as at 3 3,,which keeps the two parts together at the top, and makes them sink together in the sand. The two pieces riveted to B, as at 5 5, are three inches long and one inch wide and one quarter. of an inch thick, and are two inches from the top. They keep the two parts of the caisson from going sidewise at the top. The two pieces riveted to the bottom of B, 7 7 are two 7 7, and are fiat where they rivet to A, and

keep the bottom of the caisson together.

long, with lower edge curved upward for in- The two holes cut in A and B at l l are two inches serting a bar to raise the caisson out of the sand. There are two more holes out two feet below 1 1 two inches longand one-half an inch wide, as at 2 2, and are for the same purpose as 1 1. When in operation, the two parts are put together as described and temporarily sunk in the quicksand. Remove what is inside and set the pole inside of the caisson. The caisson is then raised with a bar inserted at 1'1 and 2 2. \Vhen the caisson is raised, the links in B are thrown back of A and the caisson taken apart and from around the pole.

I am not aware that prior to my invention there have been any caissons for setting telegraph-poles in quicksand.

What I therefore claim as my invention, and desire to secure by Letters Patent, is

A caisson for setting telegraph poles in quicksand, consisting of two semi-cylinders adapted to be united to form a complete cylinder and provided with devices, substantially as described, for holding them together.

WILLIAM MURRAY. 

